Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55ce11e5d4a296e78a3100f544f6c6532aef2767b3aeca92b5ab0f4699fe4bef' 
  AND token = '3YETyMPyQ0REkc1U6VuEipErW1zBFTEaOCoJane9k84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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