Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '615ae6f55495397c6cd00dc7396638ae0e832e11402e133311a6870e38d5a0bd' 
  AND token = 'B582HCEpKtI6JNxSO/CFmvDH95VcTG1fYB78L6TvAMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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