Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5bacee88daa875e08c7fd47c2d0bc048c4503ba7fa69a0b6cd0aab9ae3d3e44' 
  AND token = 'nODoLc08a0uQdQSSM7A+Yhj8IXCFHXPJ/KkcQkNRZ80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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