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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffa073c6c1193f945952cd4e503e2974783acd00ff2e05be688531d225c740ea' 
  AND token = 'qq21iUB4G1fW3Zqe+YTyzM9lL9sAymkQr+90XmDqCm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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