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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'f0a653fb7a79c204f986026e5b3980264dbd944acdf30f07abae6623ab82cbfe' 
  AND token = 'MmtnB/bCucKuFw9isUymcKmNg6pI6Ql2PnhPOHNi1fY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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