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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '348de34ad6931fdceee1ff405bd3c72705ac1f3d72b9637792661e60a5bdb74a' 
  AND token = 'twJO6YUZycWgb0P4wBC3cjFLvpWR3S/LbHTcRRaPcDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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