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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '135505a2845b772a1ef490d7e33ba685a63626c0e6ba223abbc7187ac0549eed' 
  AND token = '+5Xeux8CbYzYsgDUUMdCFkwtoKaPdgYh5fctoAR8kH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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