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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e98c88295b82e16cb514c25d8c854d9405f7e7032c8d10f67d55251b2f018ad1' 
  AND token = '2vEf0PbV0bB+V+VfXcfOinXJbJB83fEtNhmGj5ijexc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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