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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e44f4895323a7f655f82bc385398ad66d87f30dd9927d20214eae591dbe4359' 
  AND token = 'QdACZs+C9d4TuUb2M3J3KqaBmWcMAkfYdxfy0w9xr6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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