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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84d71bc5dc7d035b6e2512d15e1e51522c9c22d468fd10c40c0f46ef8e50493f' 
  AND token = 'TaY6LIsOo9RIQ/R0sI57MlK8uhI7ZpfFYp1Dw7F6s/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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