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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9696f07e36c31471f0f7f614f4adf096532670f210e31c60922976dba15b7fe3' 
  AND token = '2CORqyaIfg0ZONSu7vLk2BlvByqt2fq3f+4N9jjluco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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