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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbe4549cf93c664382436b74d163a1d751953b362ca9dc28ff7ea9d7e507b3cb' 
  AND token = 'Ju4YfbDLP9O4unO91TTEbSZw1UjvUhO97/RmYNpg/q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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