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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afd67917110e93d3caebcd6a264d4f127be867619a61a0d370450f245a34e9cd' 
  AND token = 'Ns+nNfeMcICpHP+k8/bMjr9VnzbcLiqeeoYs22t9wds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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