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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '057111103ce92fd949d04328ff3d78b6154c2ff9471e95b4e71b132b540b1821' 
  AND token = 'Djyeqf7Pb2Ytg6hc88oUI1MVhYQ6Z67MItPx1o9t5Jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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