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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'becc4e13ae5e9fd5b93c90031ba60564f3cd527509b109eeea1bf2ce253af15d' 
  AND token = '4pXR8guGoCqH52b06KW2UPcNh7pGKlp1i7C2+2HpQtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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