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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c812b5af6ad14bb424418dfe34c401fc0673294331ddfa944bebd377da91010' 
  AND token = 'X2H9NRstFrKX5ghOer7OnP9C0P+D+cB5HFaR4NW90gA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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