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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '585d4b7d0c7abf229e6efe2a6615e0f7884714a2793f73d0d23af06d58364f58' 
  AND token = 'xT/S8wvwxyCwBRE6boblbcc1HhGAF1LMnLJkQInFSIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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