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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95b053d1f024790c21c4acc7bdf72b687c658aa35773cae8ecd9428166cc81b9' 
  AND token = 'zo0kweP2tgelGxD0tdmSLFO8tGJvFUIMO3URq9V5Ipk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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