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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'faacd738028f91918afc2524dc88d9a7d2fb5d98c711ef0fd62f4caa588d5dfc' 
  AND token = 'gCoMEYYwvjunL6PqcMZ6ADfS186kvT/KqnOl48Z8Qv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}