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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2f1fcdf760c30c36006587413d8b8b0a04bd52f636c5b048bc8662383d000f1a' 
  AND token = 'JHPoQOOyt6RJB51rVt3bWbae4EnH+DsgTrVHED7rrOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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