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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a495af6addbfcc5705309f4f87e6d7b740fffb40a4f14c920131c673dcdb618c' 
  AND token = 'Iq5c0A6A4CWNbrGXI48YQZNFNjEflvbx4xMAHXrJkpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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