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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae0841af65813b26a9327bf304c4f0eb8e3f52dfce86040ba1f157c8f3a067aa' 
  AND token = 'OfErlPsGhM9Tfu9ctLFZlROgD75X9fbKrTD7ensyaPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}