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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd2d785dbc56b9ff2fb85cb752cf7ab3dcdec82983a09319b09cdd46b59e2627' 
  AND token = 'Pnq03yk3cAzxCfaeP7lDH9/Eic4DHxmrJ5sN3NTe3DY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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