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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '466ed7c0e15131f0a8c9cfbd68d2e8de25fe68d502e243ef7f8241fd641ce635' 
  AND token = 'j5i5oCQGTaa9iagFb7odPD1qSbQR9tIPYMPaGjV8fG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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