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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '695607d1cec4a22c9083373de291dd63739ea27b526e9e2f372875868fe06687' 
  AND token = 'GdCOjH6J4E0uVE6/vYXMOvH9vQjSAS1O19IGEUNynpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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