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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '637f394780e3573942c32c30e969c919ff83cd27fc05aa477d83b8ddbc6efd59' 
  AND token = 'OLw6tQb4XwSPojpBRlbqN/5R/HbudvhuC2pfAdeZ/3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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