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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6780beb30e39510d96a34e78dda0b2f585a6f75307c1490ab411b67e2a9ab632' 
  AND token = 'YnOfxuKfclLtl8x9l7FBGhIxfSPAIm+k9tvY2ftDMTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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