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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abb75a70cfea100163f35c770b79ac6e55cb97675b3ec7f2e994dadc8a83221f' 
  AND token = 'RBQmIGzcR3HoUIzXvyORR6t8R4LI7xy3j5l2iQor6X0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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