SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '696d30e05441105eafc06c859d2036a518dc3964ba194d0ace2fb26edad117b2' 
  AND token = 'YEehYhs2J3JpNGtKZGNKL1fi3K4Vj7XC36joqQVuFgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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