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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d5e1a1353362d08f419c5f5ec9c5e08be897bc941ce969209f940d495fd8872' 
  AND token = 'SeyFqQcpSROVhHuIVFobStu9CSZWyZYn96AXP2NWdcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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