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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4419d424461cc75c6fbf63356bb5f3daf7d474eb7eafcfb1a3615c06c9ad13b7' 
  AND token = '61opmzh0FAwqZxShMB2Rcia4bJeZVvSR1FxKMbJID0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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