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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '606d0bf759ad8086c03e0adfc78053a7590b333581fa1f6e0ace606ffb14915e' 
  AND token = 'vEg+raX/aIt9CEmSqqYqp0SfHn31r4FMgnoabsXl9Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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