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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faa06770f5cf1aa33cd250eef097bb04cce5d5778b4b63d625afeb115c21d2f7' 
  AND token = 'p90Gi+UYwAueXlySd3htCerfk75xE9hbAB1NSC+oitA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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