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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be5eacd24f1d0565efc70c0b0837f8d1fe092a10ea4180e024c7fae8a2b127ec' 
  AND token = 'TuuRguPtHQtG24KOIeRDnxfzNsK7bFap97yFS/CgXMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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