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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15dac43becbc06b8cbf1e170ede8977597a26a3a92be771a773b630b0133eb3c' 
  AND token = 'IiAe1yAQyiPBJnwgrgT3WYkvcQpIMH4um8qw08M7u9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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