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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccfc39f32442c1bff6f98273c3e6eeea67aa01e0ed5df1ec0aeaa8299b609dfb' 
  AND token = 'XzpotCM2I7OjzSJOPzt9KF2GVWaaP2VSxU7pO5rkvis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00150

JSON explain

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