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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09ba0c4986885ad88afec8ac09cecb8ab3e8a1780d1ee35132ceaeee2cb7a245' 
  AND token = '2BijuKPlBSWbQL+HqF2XAMafg+3+0NqX5lSvIWJuwsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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