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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0826aa002f735da5ff31e1eafbd424cfe4e656fe02004118ed08873d4664e314' 
  AND token = 'P3TJuy7/Bs2M305Kfft+33Vu3PzJikn8q/JmNE7FiWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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