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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0743c70fa7a0ad0b1164511793e51500a7458ac56b5dcae6798ac918120fe85' 
  AND token = 'z+x4eahsZ1rroGEKEMLKjBLiyU6/uG1rfr0ExwyQTXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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