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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a87ff9b671e0f77879d1ef35c7bc5cd47b337566ac2b07a24241ced0011b5d5e' 
  AND token = 'p1C0nEBf8xu9xxdwuSx1bXiemh4Yt8zPyVOb81F4djg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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