Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '68fa0c1d32032017d478139b1ff61851dba863e08cb924d9b0c545b62ef3fbb1' 
  AND token = 'T0EYVVaHtr5Al7Qgtc58QlEBr/pCnUAlSVMt9U57RCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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