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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a03e87f09b3c33f5e183d4a5bb9d713040f331a38fcad68b0e7d8a00c6020b1' 
  AND token = '/d4YRoZNI0cSkERyHlRD8oevA0HAPIPdeNwNcU/AM+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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