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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00c2e48a3b2bbea7b7fc4875fdaf04445c38c2d58f473513c469ad41205151aa' 
  AND token = 'BjpUw98FAp6nfwT9Takxd7FcPn9SvQ/f8Z+foR6iCT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}