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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b11d8770070dc5f92acb7d791d053121482ce5bc43b8f55883e6ae737a72d60c' 
  AND token = '54QXlrJYnkEMbxv2RbKRux7jnpmRzzlz7tPS3ACfMfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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