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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '441c811b9f0419b0f318f180ccb70a2b31a87829355c0edde6771f8288ceb63c' 
  AND token = 'RQF83/w2oLfm5a1v693xsFQHl4AelQqn+TY4jQuLPTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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