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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00fee68d283d60c7598ba2e375e3298bd6c936b89dad3bd0e19ccb614c266157' 
  AND token = 'EZ7aGBYZ8nvVGEQXSh1SFsG7hQgX0ANNMgfcG2oUaCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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