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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd48a48c7f0f37fe1c66873c3afcc5455e00071607bb8f6f715e43573c576ab0e' 
  AND token = 'MNf853pm6v/ED3WaIPNyxf2PYzWQBdFj/pZV5Ol0G+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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