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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85226479ec067db975978eaa9eaeb2bc3ed64e833a7abd1be914be2140d07ad3' 
  AND token = 'u75wxUJcLX8kC8cxM5JNlsbZk+6ch2R2hkoEvTHfb8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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