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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc7ddc34d3ffaabc4da3ebdb71653e2f16d9cfca76c415f1288db6f26758e4f1' 
  AND token = 'MD7ieLrjTAkWS+abqBAMy2w+9i9PP3WZuK6kzv3o1+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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