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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96e6c6541c112765ef9fbaa5d6d6d127b2a20f626a89e7abca80738002346659' 
  AND token = 'Urk1vLeoFzDk3DPdA7ybXdAs2wZV1uGYorBwoAjtqwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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