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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45bb39b1accf5f187dc37378840755a3c5c5795c5bd5fb24b4b38b00e023ad0f' 
  AND token = 'b+cLMZa9/wRecsjY64i/BQosN1lq01K5ilGv2H7MY8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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