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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd52f501d8cb4f8b499df750568e51c17b014416b06510eb4b558411ac446d2f0' 
  AND token = 'iuBqqXpjXI3bvZNsaryNBdGOnmNhpKleyJckeOjKXzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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