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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'adf3860b499111e19111b474d2b950b0d622e5c9c2e295545aabcee23289f1e9' 
  AND token = '5lwpuymmPFYOEHjWx1Svzqy6fr/ocZs7odsz/5fgO9o=' 
  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"
    }
  }
}