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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dabf7a6088d6739dc5a8d12225cc8f8d796a3d598a9d6ba97c6b41e261565f29' 
  AND token = 'tYG6CCe0DOjUs/6P9SjpRhRvPH1xv/TNE8hyMrcnEqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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