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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1cf82cbcd68f0ca611202cbdbf41bc64b878d06f06af06b9462ba08d7edb3ae' 
  AND token = 'kP3FDrBpz8QCUeAzfXNXwHruFVT2UCp9f4xdRng6R9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}