SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '014a5f90781266a904734cea523b474ffaeffff038178f92e547f9a391d7c85a' 
  AND token = 'WqQFWACVAJNeVBHub+BEuKG7H4UTYBXn/Th+KmxQxgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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