SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1a59fdd591c70acbf64651a4b39aaee67869915f62dc0ce2b1c62f7436f6c1c' 
  AND token = 'JEyLiMNKPSF5yBmNa0UrmqYh89w3DACKdnXzH/bYRtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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