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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8f829d598c82351aa70573c1713ba6f9069d8775baa35dec70f2ac00f632cfec' 
  AND token = 'c/oeKKo3ZmxN0e1GYdVMxzsXV7GyPvjcOq5drqy3IxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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