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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f532d7262945b9045246d0d40963a3450d99b58fceb5adbce5c9ca2a7d6cebad' 
  AND token = 'okicguZeBmRRPbl82Fotwir4J9pZJMdwVA9Q14zqv9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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