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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd95a888c0f2a970d80fc72c9f4a01647cc5ddae544b88dc92f0136d94bc53b2e' 
  AND token = 'kNW/j1ccumA48d6CnV+fBrL4oWa28wsW9qA7e/rrmtY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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