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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'c04841698b3672a0e56d399b0f921115dbd51a88b29c787d95f77dfb60405cb9' 
  AND token = 'z8n38hhQR3chxsyfC7RfrN3Yctc44/XuMuqNq414zKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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