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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d6e79de3b79c50fc269b9cf165532f286be960078ba4b8157a99e852057394b' 
  AND token = 'lZx6wwiOTGyRyNSShRQ6ynMZNIs3adPmgM/ahZn3NHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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