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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceeb09287302e9006f7f8032d7bdd9b804a8ac7179e0e56a12ccf06d6a0a24d2' 
  AND token = '/M3IG8xaHreO685opAMYnIRSoBl7b3RhdC9phIuaifA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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