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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '61460d209efe4366949e0de4f1d0237ce0c4c31c1a9e44f2eace59abef8ea488' 
  AND token = '0xSqUJ/72xZyq5fUMIkvK9pk678pjPLgVF4HxG2Iv7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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