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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99335d6b36617eb8576f5ac181729abc19cc1d9082de89752c12b18b68a05aa8' 
  AND token = 'bksNrX0Z7biNTblyM+tDnOMD+qiHCxlbd5Wf62u2Rbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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