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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5e8bbc4a0865eee8c31945ad766820f57cff03c7a908f6b23bfb119c0d9e5df' 
  AND token = '2HXMe66V9pdDdKk6GrTO8TAVSROU0C4R89QDVZ41sNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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